Jawabanmu

2014-01-29T19:50:24+07:00
Dik : Sn=4n²-3n
Dit : U2 =.. ?
Jawab :

a = U1 = S1 = 4(1)²-3(1) = 4 - 3 = 1
S2 = 4(2)²-3(2) = 16 - 6 = 10

S2 = U1 + U2
10 = 1 + U2
U2 = 10 - 1
U2 = 9